<?xml version="1.0"?>
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  <dc:title xmlns:dc="http://purl.org/dc/elements/1.1/">SmartBuoy observational network - Noordwijk 5</dc:title>
  <dc:type xmlns:dc="http://purl.org/dc/elements/1.1/">dataset</dc:type>
  <dc:identifier xmlns:dc="http://purl.org/dc/elements/1.1/">https://portal.medin.org.uk/portal/start.php?tpc=009_CEFASb633f99f-8dfa-40bc-93f1-ffea7ffd660a</dc:identifier>
  <dc:description xmlns:dc="http://purl.org/dc/elements/1.1/">On the SmartBuoy, surface measurements of plant nutrient concentrations are 
derived from two instruments. The NAS-3X in-situ nutrient analyser takes 
hourly measurements of nitrate concentration, while lower frequency (daily) 
measurements of nitrate and silicate concentration are derived from laboratory 
analysis of water samples collected and preserved by the WMS-2 water sampler. 
An estimate of phytoplankton concentration (biomass) is obtained twice per 
hour using a fluorometer measuring chlorophyll fluorescence. To aid 
interpretation of these data, SmartBuoy also takes measurements of 
conductivity, temperature, suspended sediment concentration, light penetration 
with the ESM2 logger. Data are telemetered every two hours using ORBCOMM 
satellite telemetry.

 The Noordwijk 5 SmartBuoy is located at 52.2758 N, 4.3668 E. It started 
logging in February 2002 and finished in April 2002.</dc:description>
  <dc:date xmlns:dc="http://purl.org/dc/elements/1.1/">20140220 20140218</dc:date>
</oai_dc:dc>